The Ventaxian civilization, suffering from environmental pollution, severe overcrowding, and constant warfare, begin a thousand-year period of peace and prosperity. According to legend, the Ventaxians made a pact with a supernatural being named Ardra. (TNG: "Devil's Due")

The planet Kataan suffers a protracted drought due to increasing solar radiation. Realizing that their sun was about to go nova, the inhabitants launch a probe containing a memory record of their civilization. (TNG: "The Inner Light")

Qo'noS is attacked by a group of plundering aliens, whom the Klingons name the Hur'q. Many cultural artifacts are stolen, most notably the Sword of Kahless. (DS9: "The Sword of Kahless") Also during this period, Klingon warriors set out and slay all of their gods, because they are more trouble than they are worth. (DS9: "Homefront")

The ruling family of the Ramatis system are discovered to lack the gene required for the sense of hearing. A system is developed in which the members of the ruling family may both hear and speak through a "chorus" of interpreters. (TNG: "Loud As A Whisper")

The people of Mintaka III begin to experience a transformation in their society as they move away from their belief in the Overseer towards a new understanding of their world based on logic and rational thinking. (TNG: "Who Watches The Watchers")

Gomtuu, a living spaceship, contacts one of its own kind, a contact that will be the last for many centuries. (TNG: "Tin Man")

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